Are you talking about the 10 round post ban mags or the Pre ban mags that they sell when they have them?
The Preban mags are actually Labell mags (I believe) Teflon coated. The newer post ban mags are good but the older franken mags that then now sell as the Bullpup mags aren't as good.

Are the the teflon coated aluminum 30 rounders, the post ban curved 10 rounders, Postban steel 10 roundrs, or the crappy steel 40 rounders. The only ones out of those that would be crap would be the steel 40 rounders with the steel 10 rounders following as the second crappiest of the group. The aluminum ones are good to go, though.

you may have one of two types of mags. The Labell mags I spoke of earlier, or someone took USGI mags and bought rebuild kits from Bushmaster. In either case you are good to go (As long as the mag bodies are indeed Alluminum USGI bodies).

The dimensions of Bushmaster magazines are spec., they were subcontracted out to LaBelle, a GI manufacturer as stated earlier. The Teflon, may or may not be spec(a lot of current debate, in another thread), BUT, I can't think of a single reason, spec. or not, that Teflon would HAMPER, performance of a mag. IN THEORY, a coating like Teflon, should only improve the performance of a magazine type mechanism.
All of the Bushmaster magazines that I've used have fed well and worked consistently reliably, at least as reliaby as any spec GI mag.

"Son we live in a world that has walls, and those walls have to be guarded by men with guns..."

thanks guys, appreciate it much... yes i believe they are teflon coated... they are pretty much new, bought them a few months ago, havent used them yet.... was just wondering of the rumor... thanks for clearing up for me....very helpful indeed...

The teflon coating is NOT Mil-Spec, but it IS a much superior finish than the Mil-Spec moly dry-film lube "finish".
In many cases, the military will keep an old product or process LONG after it's really obsolete, simply because they don't want to spend the money to change the spec of something that already works.
Just a few years ago, they were FINALLY forced to change the specs for batteries, as standard military C, D, AA, AAA, and 9V batteries were all the ancient "carbon" batteries, while the rest of the world went to much superior alkaline batteries in the early 80s. In 2000, the military tried to renew the contract for batteries, using the 30-year-old specs, and none of the battery companies would bid on it, because they didn't make carbon batteries anymore. The military then had to update the spec to get the contract fulfilled.
-Troy